shots were heard at sandy hook elementary in newtown, connecticut around 9:30 this morning. lanza was reportedly armed with two handguns, dressed in dark clothing, a mask and a vest. 20 young children and six adults were killed before turning a gun on himself. the investigation is unfolding rapidly at this hour. joining me now is clint va van zandt, a former f.b.i. profiler and an nbc news analyst. clint, thanks for being here tonight. >> good to be with you, al. >> what are officials doing right now to try to advance this investigation? what are they looking for? >> al, as you know, they've got multiple crime scenes. they've got to horrific scene at the school where every law enforcement officer, the first responder goes in, i'm sure the tendency breaks down in tears because that could be their children or grandchildren. you've got that crime scene they have to deal with. and then you've got the separate crime scene of the victim's mother's home where we're told that she was shot in the face and killed. we've got that crime scene. and then you've got any location where the